[net-next-2.6.git] / net / netfilter / nf_conntrack_standalone.c

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/percpu.h>
#include <linux/netdevice.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>

MODULE_LICENSE("GPL");

#ifdef CONFIG_PROC_FS
int
print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
	    struct nf_conntrack_l3proto *l3proto,
	    struct nf_conntrack_l4proto *l4proto)
{
	return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
}
EXPORT_SYMBOL_GPL(print_tuple);

#ifdef CONFIG_NF_CT_ACCT
static unsigned int
seq_print_counters(struct seq_file *s,
		   const struct ip_conntrack_counter *counter)
{
	return seq_printf(s, "packets=%llu bytes=%llu ",
			  (unsigned long long)counter->packets,
			  (unsigned long long)counter->bytes);
}
#else
#define seq_print_counters(x, y)	0
#endif

struct ct_iter_state {
	unsigned int bucket;
};

static struct hlist_node *ct_get_first(struct seq_file *seq)
{
	struct ct_iter_state *st = seq->private;

	for (st->bucket = 0;
	     st->bucket < nf_conntrack_htable_size;
	     st->bucket++) {
		if (!hlist_empty(&nf_conntrack_hash[st->bucket]))
			return nf_conntrack_hash[st->bucket].first;
	}
	return NULL;
}

static struct hlist_node *ct_get_next(struct seq_file *seq,
				      struct hlist_node *head)
{
	struct ct_iter_state *st = seq->private;

	head = head->next;
	while (head == NULL) {
		if (++st->bucket >= nf_conntrack_htable_size)
			return NULL;
		head = nf_conntrack_hash[st->bucket].first;
	}
	return head;
}

static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
{
	struct hlist_node *head = ct_get_first(seq);

	if (head)
		while (pos && (head = ct_get_next(seq, head)))
			pos--;
	return pos ? NULL : head;
}

static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
{
	read_lock_bh(&nf_conntrack_lock);
	return ct_get_idx(seq, *pos);
}

static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
	(*pos)++;
	return ct_get_next(s, v);
}

static void ct_seq_stop(struct seq_file *s, void *v)
{
	read_unlock_bh(&nf_conntrack_lock);
}

/* return 0 on success, 1 in case of error */
static int ct_seq_show(struct seq_file *s, void *v)
{
	const struct nf_conntrack_tuple_hash *hash = v;
	const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
	struct nf_conntrack_l3proto *l3proto;
	struct nf_conntrack_l4proto *l4proto;

	NF_CT_ASSERT(conntrack);

	/* we only want to print DIR_ORIGINAL */
	if (NF_CT_DIRECTION(hash))
		return 0;

	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				       .tuple.src.l3num);

	NF_CT_ASSERT(l3proto);
	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				   .tuple.src.l3num,
				   conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				   .tuple.dst.protonum);
	NF_CT_ASSERT(l4proto);

	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
		       l3proto->name,
		       conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
		       l4proto->name,
		       conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
		       timer_pending(&conntrack->timeout)
		       ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
		return -ENOSPC;

	if (l3proto->print_conntrack(s, conntrack))
		return -ENOSPC;

	if (l4proto->print_conntrack(s, conntrack))
		return -ENOSPC;

	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
			l3proto, l4proto))
		return -ENOSPC;

	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
		return -ENOSPC;

	if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
		if (seq_printf(s, "[UNREPLIED] "))
			return -ENOSPC;

	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
			l3proto, l4proto))
		return -ENOSPC;

	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
		return -ENOSPC;

	if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
		if (seq_printf(s, "[ASSURED] "))
			return -ENOSPC;

#if defined(CONFIG_NF_CONNTRACK_MARK)
	if (seq_printf(s, "mark=%u ", conntrack->mark))
		return -ENOSPC;
#endif

#ifdef CONFIG_NF_CONNTRACK_SECMARK
	if (seq_printf(s, "secmark=%u ", conntrack->secmark))
		return -ENOSPC;
#endif

	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
		return -ENOSPC;
	
	return 0;
}

static const struct seq_operations ct_seq_ops = {
	.start = ct_seq_start,
	.next  = ct_seq_next,
	.stop  = ct_seq_stop,
	.show  = ct_seq_show
};

static int ct_open(struct inode *inode, struct file *file)
{
	struct seq_file *seq;
	struct ct_iter_state *st;
	int ret;

	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
	if (st == NULL)
		return -ENOMEM;
	ret = seq_open(file, &ct_seq_ops);
	if (ret)
		goto out_free;
	seq          = file->private_data;
	seq->private = st;
	memset(st, 0, sizeof(struct ct_iter_state));
	return ret;
out_free:
	kfree(st);
	return ret;
}

static const struct file_operations ct_file_ops = {
	.owner   = THIS_MODULE,
	.open    = ct_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_private,
};

static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
{
	int cpu;

	if (*pos == 0)
		return SEQ_START_TOKEN;

	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return &per_cpu(nf_conntrack_stat, cpu);
	}

	return NULL;
}

static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	int cpu;

	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return &per_cpu(nf_conntrack_stat, cpu);
	}

	return NULL;
}

static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
{
}

static int ct_cpu_seq_show(struct seq_file *seq, void *v)
{
	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
	struct ip_conntrack_stat *st = v;

	if (v == SEQ_START_TOKEN) {
		seq_printf(seq, "entries  searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error  expect_new expect_create expect_delete\n");
		return 0;
	}

	seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
			"%08x %08x %08x %08x %08x  %08x %08x %08x \n",
		   nr_conntracks,
		   st->searched,
		   st->found,
		   st->new,
		   st->invalid,
		   st->ignore,
		   st->delete,
		   st->delete_list,
		   st->insert,
		   st->insert_failed,
		   st->drop,
		   st->early_drop,
		   st->error,

		   st->expect_new,
		   st->expect_create,
		   st->expect_delete
		);
	return 0;
}

static const struct seq_operations ct_cpu_seq_ops = {
	.start	= ct_cpu_seq_start,
	.next	= ct_cpu_seq_next,
	.stop	= ct_cpu_seq_stop,
	.show	= ct_cpu_seq_show,
};

static int ct_cpu_seq_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &ct_cpu_seq_ops);
}

static const struct file_operations ct_cpu_seq_fops = {
	.owner	 = THIS_MODULE,
	.open	 = ct_cpu_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release_private,
};
#endif /* CONFIG_PROC_FS */

/* Sysctl support */

int nf_conntrack_checksum __read_mostly = 1;
EXPORT_SYMBOL_GPL(nf_conntrack_checksum);

#ifdef CONFIG_SYSCTL
/* Log invalid packets of a given protocol */
static int log_invalid_proto_min = 0;
static int log_invalid_proto_max = 255;

static struct ctl_table_header *nf_ct_sysctl_header;

static ctl_table nf_ct_sysctl_table[] = {
	{
		.ctl_name	= NET_NF_CONNTRACK_MAX,
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_COUNT,
		.procname	= "nf_conntrack_count",
		.data		= &nf_conntrack_count,
		.maxlen		= sizeof(int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name       = NET_NF_CONNTRACK_BUCKETS,
		.procname       = "nf_conntrack_buckets",
		.data           = &nf_conntrack_htable_size,
		.maxlen         = sizeof(unsigned int),
		.mode           = 0444,
		.proc_handler   = &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_CHECKSUM,
		.procname	= "nf_conntrack_checksum",
		.data		= &nf_conntrack_checksum,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_LOG_INVALID,
		.procname	= "nf_conntrack_log_invalid",
		.data		= &nf_ct_log_invalid,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &log_invalid_proto_min,
		.extra2		= &log_invalid_proto_max,
	},
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "nf_conntrack_expect_max",
		.data		= &nf_ct_expect_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{ .ctl_name = 0 }
};

#define NET_NF_CONNTRACK_MAX 2089

static ctl_table nf_ct_netfilter_table[] = {
	{
		.ctl_name	= NET_NETFILTER,
		.procname	= "netfilter",
		.mode		= 0555,
		.child		= nf_ct_sysctl_table,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_MAX,
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{ .ctl_name = 0 }
};

static ctl_table nf_ct_net_table[] = {
	{
		.ctl_name	= CTL_NET,
		.procname	= "net",
		.mode		= 0555,
		.child		= nf_ct_netfilter_table,
	},
	{ .ctl_name = 0 }
};
EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
#endif /* CONFIG_SYSCTL */

static int __init nf_conntrack_standalone_init(void)
{
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *proc, *proc_stat;
#endif
	int ret = 0;

	ret = nf_conntrack_init();
	if (ret < 0)
		return ret;

#ifdef CONFIG_PROC_FS
	proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
	if (!proc) goto cleanup_init;

	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
	if (!proc_stat)
		goto cleanup_proc;

	proc_stat->proc_fops = &ct_cpu_seq_fops;
	proc_stat->owner = THIS_MODULE;
#endif
#ifdef CONFIG_SYSCTL
	nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table);
	if (nf_ct_sysctl_header == NULL) {
		printk("nf_conntrack: can't register to sysctl.\n");
		ret = -ENOMEM;
		goto cleanup_proc_stat;
	}
#endif
	return ret;

#ifdef CONFIG_SYSCTL
 cleanup_proc_stat:
#endif
#ifdef CONFIG_PROC_FS
	remove_proc_entry("nf_conntrack", proc_net_stat);
 cleanup_proc:
	proc_net_remove("nf_conntrack");
 cleanup_init:
#endif /* CNFIG_PROC_FS */
	nf_conntrack_cleanup();
	return ret;
}

static void __exit nf_conntrack_standalone_fini(void)
{
#ifdef CONFIG_SYSCTL
	unregister_sysctl_table(nf_ct_sysctl_header);
#endif
#ifdef CONFIG_PROC_FS
	remove_proc_entry("nf_conntrack", proc_net_stat);
	proc_net_remove("nf_conntrack");
#endif /* CNFIG_PROC_FS */
	nf_conntrack_cleanup();
}

module_init(nf_conntrack_standalone_init);
module_exit(nf_conntrack_standalone_fini);

/* Some modules need us, but don't depend directly on any symbol.
   They should call this. */
void need_conntrack(void)
{
}
EXPORT_SYMBOL_GPL(need_conntrack);
Commit	Line	Data
9fb9cbb1 YK	1	/* (C) 1999-2001 Paul `Rusty' Russell
	2	* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
9fb9cbb1 YK	7	*/
9fb9cbb1 YK	8
9fb9cbb1 YK	9	#include <linux/types.h>
	10	#include <linux/netfilter.h>
	11	#include <linux/module.h>
	12	#include <linux/skbuff.h>
	13	#include <linux/proc_fs.h>
	14	#include <linux/seq_file.h>
	15	#include <linux/percpu.h>
	16	#include <linux/netdevice.h>
	17	#ifdef CONFIG_SYSCTL
	18	#include <linux/sysctl.h>
	19	#endif
	20
9fb9cbb1	21	#include <net/netfilter/nf_conntrack.h>
f6180121	22	#include <net/netfilter/nf_conntrack_core.h>
9fb9cbb1	23	#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6	24	#include <net/netfilter/nf_conntrack_l4proto.h>
77ab9cff	25	#include <net/netfilter/nf_conntrack_expect.h>
9fb9cbb1	26	#include <net/netfilter/nf_conntrack_helper.h>
9fb9cbb1	27
9fb9cbb1 YK	28	MODULE_LICENSE("GPL");
9fb9cbb1 YK	29
9fb9cbb1	30	#ifdef CONFIG_PROC_FS
77ab9cff	31	int
9fb9cbb1 YK	32	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
9fb9cbb1 YK	33	struct nf_conntrack_l3proto *l3proto,
605dcad6	34	struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	35	{
605dcad6	36	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1	37	}
e4bd8bce	38	EXPORT_SYMBOL_GPL(print_tuple);
9fb9cbb1 YK	39
	40	#ifdef CONFIG_NF_CT_ACCT
	41	static unsigned int
	42	seq_print_counters(struct seq_file *s,
	43	const struct ip_conntrack_counter *counter)
	44	{
	45	return seq_printf(s, "packets=%llu bytes=%llu ",
	46	(unsigned long long)counter->packets,
	47	(unsigned long long)counter->bytes);
	48	}
	49	#else
	50	#define seq_print_counters(x, y) 0
	51	#endif
	52
	53	struct ct_iter_state {
	54	unsigned int bucket;
	55	};
	56
f205c5e0	57	static struct hlist_node ct_get_first(struct seq_file seq)
9fb9cbb1 YK	58	{
	59	struct ct_iter_state *st = seq->private;
	60
	61	for (st->bucket = 0;
	62	st->bucket < nf_conntrack_htable_size;
	63	st->bucket++) {
f205c5e0 PM	64	if (!hlist_empty(&nf_conntrack_hash[st->bucket]))
f205c5e0 PM	65	return nf_conntrack_hash[st->bucket].first;
9fb9cbb1 YK	66	}
	67	return NULL;
	68	}
	69
f205c5e0 PM	70	static struct hlist_node ct_get_next(struct seq_file seq,
f205c5e0 PM	71	struct hlist_node *head)
9fb9cbb1 YK	72	{
	73	struct ct_iter_state *st = seq->private;
	74
	75	head = head->next;
f205c5e0	76	while (head == NULL) {
9fb9cbb1 YK	77	if (++st->bucket >= nf_conntrack_htable_size)
9fb9cbb1 YK	78	return NULL;
f205c5e0	79	head = nf_conntrack_hash[st->bucket].first;
9fb9cbb1 YK	80	}
	81	return head;
	82	}
	83
f205c5e0	84	static struct hlist_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	85	{
f205c5e0	86	struct hlist_node *head = ct_get_first(seq);
9fb9cbb1 YK	87
	88	if (head)
	89	while (pos && (head = ct_get_next(seq, head)))
	90	pos--;
	91	return pos ? NULL : head;
	92	}
	93
	94	static void ct_seq_start(struct seq_file seq, loff_t *pos)
	95	{
	96	read_lock_bh(&nf_conntrack_lock);
	97	return ct_get_idx(seq, *pos);
	98	}
	99
	100	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	101	{
	102	(*pos)++;
	103	return ct_get_next(s, v);
	104	}
	105
	106	static void ct_seq_stop(struct seq_file s, void v)
	107	{
	108	read_unlock_bh(&nf_conntrack_lock);
	109	}
	110
	111	/* return 0 on success, 1 in case of error */
	112	static int ct_seq_show(struct seq_file s, void v)
	113	{
	114	const struct nf_conntrack_tuple_hash *hash = v;
	115	const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
	116	struct nf_conntrack_l3proto *l3proto;
605dcad6	117	struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	118
9fb9cbb1 YK	119	NF_CT_ASSERT(conntrack);
	120
	121	/* we only want to print DIR_ORIGINAL */
	122	if (NF_CT_DIRECTION(hash))
	123	return 0;
	124
c1d10adb PNA	125	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	126	.tuple.src.l3num);
9fb9cbb1 YK	127
9fb9cbb1 YK	128	NF_CT_ASSERT(l3proto);
605dcad6	129	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	130	.tuple.src.l3num,
	131	conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
	132	.tuple.dst.protonum);
605dcad6	133	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	134
	135	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
	136	l3proto->name,
	137	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
605dcad6	138	l4proto->name,
9fb9cbb1 YK	139	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
	140	timer_pending(&conntrack->timeout)
	141	? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
	142	return -ENOSPC;
	143
	144	if (l3proto->print_conntrack(s, conntrack))
	145	return -ENOSPC;
	146
605dcad6	147	if (l4proto->print_conntrack(s, conntrack))
9fb9cbb1 YK	148	return -ENOSPC;
	149
	150	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	151	l3proto, l4proto))
9fb9cbb1 YK	152	return -ENOSPC;
	153
	154	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
	155	return -ENOSPC;
	156
	157	if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
	158	if (seq_printf(s, "[UNREPLIED] "))
	159	return -ENOSPC;
	160
	161	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	162	l3proto, l4proto))
9fb9cbb1 YK	163	return -ENOSPC;
	164
	165	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
	166	return -ENOSPC;
	167
	168	if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
	169	if (seq_printf(s, "[ASSURED] "))
	170	return -ENOSPC;
	171
	172	#if defined(CONFIG_NF_CONNTRACK_MARK)
	173	if (seq_printf(s, "mark=%u ", conntrack->mark))
	174	return -ENOSPC;
	175	#endif
	176
7c9728c3 JM	177	#ifdef CONFIG_NF_CONNTRACK_SECMARK
	178	if (seq_printf(s, "secmark=%u ", conntrack->secmark))
	179	return -ENOSPC;
	180	#endif
	181
9fb9cbb1 YK	182	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
	183	return -ENOSPC;
	184
	185	return 0;
	186	}
	187
56b3d975	188	static const struct seq_operations ct_seq_ops = {
9fb9cbb1 YK	189	.start = ct_seq_start,
	190	.next = ct_seq_next,
	191	.stop = ct_seq_stop,
	192	.show = ct_seq_show
	193	};
	194
	195	static int ct_open(struct inode inode, struct file file)
	196	{
	197	struct seq_file *seq;
	198	struct ct_iter_state *st;
	199	int ret;
	200
	201	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
	202	if (st == NULL)
	203	return -ENOMEM;
	204	ret = seq_open(file, &ct_seq_ops);
	205	if (ret)
	206	goto out_free;
	207	seq = file->private_data;
	208	seq->private = st;
	209	memset(st, 0, sizeof(struct ct_iter_state));
	210	return ret;
	211	out_free:
	212	kfree(st);
	213	return ret;
	214	}
	215
da7071d7	216	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	217	.owner = THIS_MODULE,
	218	.open = ct_open,
	219	.read = seq_read,
	220	.llseek = seq_lseek,
	221	.release = seq_release_private,
	222	};
	223
9fb9cbb1 YK	224	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
	225	{
	226	int cpu;
	227
	228	if (*pos == 0)
	229	return SEQ_START_TOKEN;
	230
	231	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	232	if (!cpu_possible(cpu))
	233	continue;
	234	*pos = cpu + 1;
	235	return &per_cpu(nf_conntrack_stat, cpu);
	236	}
	237
	238	return NULL;
	239	}
	240
	241	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	242	{
	243	int cpu;
	244
	245	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	246	if (!cpu_possible(cpu))
	247	continue;
	248	*pos = cpu + 1;
	249	return &per_cpu(nf_conntrack_stat, cpu);
	250	}
	251
	252	return NULL;
	253	}
	254
	255	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	256	{
	257	}
	258
	259	static int ct_cpu_seq_show(struct seq_file seq, void v)
	260	{
	261	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
	262	struct ip_conntrack_stat *st = v;
	263
	264	if (v == SEQ_START_TOKEN) {
	265	seq_printf(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete\n");
	266	return 0;
	267	}
	268
	269	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	270	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	271	nr_conntracks,
	272	st->searched,
	273	st->found,
	274	st->new,
	275	st->invalid,
	276	st->ignore,
	277	st->delete,
	278	st->delete_list,
	279	st->insert,
	280	st->insert_failed,
	281	st->drop,
	282	st->early_drop,
	283	st->error,
	284
	285	st->expect_new,
	286	st->expect_create,
	287	st->expect_delete
288	);
289	return 0;
290	}
291
56b3d975	292	static const struct seq_operations ct_cpu_seq_ops = {
9fb9cbb1 YK	293	.start = ct_cpu_seq_start,
	294	.next = ct_cpu_seq_next,
	295	.stop = ct_cpu_seq_stop,
	296	.show = ct_cpu_seq_show,
	297	};
	298
	299	static int ct_cpu_seq_open(struct inode inode, struct file file)
	300	{
	301	return seq_open(file, &ct_cpu_seq_ops);
	302	}
	303
da7071d7	304	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	305	.owner = THIS_MODULE,
	306	.open = ct_cpu_seq_open,
	307	.read = seq_read,
	308	.llseek = seq_lseek,
	309	.release = seq_release_private,
	310	};
	311	#endif /* CONFIG_PROC_FS */
	312
	313	/* Sysctl support */
	314
94aec08e	315	int nf_conntrack_checksum __read_mostly = 1;
13b18339	316	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
72b55823	317
9fb9cbb1	318	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	319	/* Log invalid packets of a given protocol */
	320	static int log_invalid_proto_min = 0;
	321	static int log_invalid_proto_max = 255;
	322
	323	static struct ctl_table_header *nf_ct_sysctl_header;
	324
	325	static ctl_table nf_ct_sysctl_table[] = {
	326	{
	327	.ctl_name = NET_NF_CONNTRACK_MAX,
	328	.procname = "nf_conntrack_max",
	329	.data = &nf_conntrack_max,
	330	.maxlen = sizeof(int),
	331	.mode = 0644,
	332	.proc_handler = &proc_dointvec,
	333	},
	334	{
	335	.ctl_name = NET_NF_CONNTRACK_COUNT,
	336	.procname = "nf_conntrack_count",
	337	.data = &nf_conntrack_count,
	338	.maxlen = sizeof(int),
	339	.mode = 0444,
	340	.proc_handler = &proc_dointvec,
	341	},
	342	{
	343	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	344	.procname = "nf_conntrack_buckets",
	345	.data = &nf_conntrack_htable_size,
	346	.maxlen = sizeof(unsigned int),
	347	.mode = 0444,
	348	.proc_handler = &proc_dointvec,
	349	},
39a27a35 PM	350	{
	351	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	352	.procname = "nf_conntrack_checksum",
	353	.data = &nf_conntrack_checksum,
	354	.maxlen = sizeof(unsigned int),
	355	.mode = 0644,
	356	.proc_handler = &proc_dointvec,
	357	},
9fb9cbb1 YK	358	{
	359	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	360	.procname = "nf_conntrack_log_invalid",
	361	.data = &nf_ct_log_invalid,
	362	.maxlen = sizeof(unsigned int),
	363	.mode = 0644,
	364	.proc_handler = &proc_dointvec_minmax,
	365	.strategy = &sysctl_intvec,
	366	.extra1 = &log_invalid_proto_min,
	367	.extra2 = &log_invalid_proto_max,
	368	},
f264a7df PM	369	{
	370	.ctl_name = CTL_UNNUMBERED,
	371	.procname = "nf_conntrack_expect_max",
	372	.data = &nf_ct_expect_max,
	373	.maxlen = sizeof(int),
	374	.mode = 0644,
	375	.proc_handler = &proc_dointvec,
	376	},
9fb9cbb1 YK	377	{ .ctl_name = 0 }
	378	};
	379
	380	#define NET_NF_CONNTRACK_MAX 2089
	381
	382	static ctl_table nf_ct_netfilter_table[] = {
	383	{
	384	.ctl_name = NET_NETFILTER,
	385	.procname = "netfilter",
	386	.mode = 0555,
	387	.child = nf_ct_sysctl_table,
	388	},
	389	{
	390	.ctl_name = NET_NF_CONNTRACK_MAX,
	391	.procname = "nf_conntrack_max",
	392	.data = &nf_conntrack_max,
	393	.maxlen = sizeof(int),
	394	.mode = 0644,
	395	.proc_handler = &proc_dointvec,
	396	},
	397	{ .ctl_name = 0 }
	398	};
	399
	400	static ctl_table nf_ct_net_table[] = {
	401	{
	402	.ctl_name = CTL_NET,
	403	.procname = "net",
	404	.mode = 0555,
	405	.child = nf_ct_netfilter_table,
	406	},
	407	{ .ctl_name = 0 }
	408	};
13b18339	409	EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
9fb9cbb1 YK	410	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	411
65b4b4e8	412	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	413	{
32292a7f	414	#ifdef CONFIG_PROC_FS
e9c1b084	415	struct proc_dir_entry proc, proc_stat;
32292a7f PM	416	#endif
	417	int ret = 0;
	418
	419	ret = nf_conntrack_init();
	420	if (ret < 0)
	421	return ret;
	422
	423	#ifdef CONFIG_PROC_FS
	424	proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
	425	if (!proc) goto cleanup_init;
	426
32292a7f PM	427	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
32292a7f PM	428	if (!proc_stat)
e9c1b084	429	goto cleanup_proc;
32292a7f PM	430
	431	proc_stat->proc_fops = &ct_cpu_seq_fops;
	432	proc_stat->owner = THIS_MODULE;
	433	#endif
	434	#ifdef CONFIG_SYSCTL
0b4d4147	435	nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table);
32292a7f PM	436	if (nf_ct_sysctl_header == NULL) {
	437	printk("nf_conntrack: can't register to sysctl.\n");
	438	ret = -ENOMEM;
	439	goto cleanup_proc_stat;
	440	}
	441	#endif
	442	return ret;
	443
	444	#ifdef CONFIG_SYSCTL
	445	cleanup_proc_stat:
	446	#endif
	447	#ifdef CONFIG_PROC_FS
	448	remove_proc_entry("nf_conntrack", proc_net_stat);
32292a7f PM	449	cleanup_proc:
	450	proc_net_remove("nf_conntrack");
	451	cleanup_init:
	452	#endif /* CNFIG_PROC_FS */
	453	nf_conntrack_cleanup();
	454	return ret;
9fb9cbb1 YK	455	}
9fb9cbb1 YK	456
65b4b4e8	457	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	458	{
32292a7f	459	#ifdef CONFIG_SYSCTL
601e68e1	460	unregister_sysctl_table(nf_ct_sysctl_header);
32292a7f PM	461	#endif
	462	#ifdef CONFIG_PROC_FS
	463	remove_proc_entry("nf_conntrack", proc_net_stat);
32292a7f PM	464	proc_net_remove("nf_conntrack");
	465	#endif /* CNFIG_PROC_FS */
	466	nf_conntrack_cleanup();
9fb9cbb1 YK	467	}
9fb9cbb1 YK	468
65b4b4e8 AM	469	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	470	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	471
	472	/* Some modules need us, but don't depend directly on any symbol.
	473	They should call this. */
2e4e6a17	474	void need_conntrack(void)
9fb9cbb1 YK	475	{
9fb9cbb1 YK	476	}
13b18339	477	EXPORT_SYMBOL_GPL(need_conntrack);